Abstract:
A pressure container has a steel pipe (40) and an end plate (50) that is formed with a joint portion (Q) by allowing its tapered surface (51d) to touch a tapered surface (41c) of an opening end of the steel pipe (40) so as to block the opening end. The steel pipe (40) has a flange portion (45) which can be cut at the opening end of the steel pipe (40), and the joint portion (Q) is allowed to touch the flange portion (45). The flange portion (45) is pressed against the opening end along an axial direction (C) so as to touch the end plate (50), and while the end plate (50) is being pressed against the steel pipe (40) along the axial direction (C), an electric current is applied so that welding is carried out.